Engine-governor



(No Model.) I

D. A. TOMPKINS 81; P. BIGELOW.

as cm, mow-qua, WAsnmaYon, 0J1

UNITED STATES PATENT OFFICE.

DANIEL A. TOMPKINS AND PAUL BIGELOl/V, OF CHARLOTTE, NORTH CAROLINA.

ENGINE-GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 469,105, dated February 16, 1892.

Application filed October 30, 1889. Serial N0. 328,633- (No model.)

To all whom it may concern:

Be it known that we, DANIEL A. ToMPKiNs and PAUL BIeELow, citizens of the United States, residing at Charlotte, in the county of Mecklenburg and State of North Carolina, have invented certain new and useful Improvements in Engine-Governors, of which improvements the following is a specification.

In the accompanying drawings, which make part of this specification, Figure I is a face view, in elevation, of the governor embodying our invention; Fig. II, a sectional view of the same on the line as so.

Our invention relates to that class of engine-governors which have a movable eccentric controlled by a spring or springs and one or more weights which have a tendency to act by centrifugal force in a contrary direction to the aforesaid spring or springs.

The object of our invention is to simplify and economize to a large extent in the construction of a governor of this type and to enable the same to be readily applied to or removed from an engine.

To this end our-invention, generally stated, consists in the combination, with a pulley or fly-wheel, of an eccentric with or without an opening or passage from its periphery to a transverse shaftway; also, in the combination of a band or fiy wheel with an eccentric having a shaft-opening and a lateral passage therefrom, a weight or weights pivoted directly to the eccentric,and aspring or springs acting directly on this weight or weights.

The improvements claimed are hereinafter fully set forth.

In governors of the class to which our invention relates it is customary to divide the eccentric in order to place it in position around the shaft. The weights which exert centriftion, beside the constant attention required to keep the joints lubricated. Under our invention we are enabled to much reduce the.

periphery to the shaftway, the gap H being somewhat wider than the diameter of the shaft to enable the eccentric to stride the shaft.

In practice we find it convenient to use a common fly-wheel or pulley P, with the addition of two lugs L L and two bosses, (shown at J and J these two lugs and bosses being cast on the arms of the pulley at the proper location. At the bosses J and J are pivoted the two weights WV and W, which when the mechanism is in rotation are held against centrifugal action by the springs S and S. Ata certain distance from the fulcrums J J the eccentric E is pivoted directly to the weights. As the revolutions of the wheel P increase the weights have atendency to swing around the pivots J J against the tension of the springs S S. Atthe same time the eccentric is moved, its eccentricity decreased, and consequently the travel of the attachedvalve is reduced, less steam is admitted, and the engine reduces its speed. The tension of the springs may be adjusted by means of the jamnuts at N, and the end of the spring is firmly held in position by thesame.

e claim herein as our invention- 1. The combination of a common fly-wheel or pulley, a movable eccentric having a transand second class, acting'direct-ly upon the eccentric, substantially assetforth.

exert tension thereon in an opposite direction to the centrifugal action of the Weight or Weights, substantially as set forth.

2. The combination, with a fiy-Wheel, of an 5 eccentric having a transverse shaft-opening and a lateral passage therefrom to its periph- Witnesses: cry, and weight-arms s0 pivoted'to theeccen P. O. 'HEBERT, trio and fly-wheel as to form levers of the first W. W. THOMAS, Jr.

DANIEL A. TOMPKINS. PAUL BIGELOW. 

